- Title
- Use of Pressurized Oxidation of Cu2O as a Means of Improving the Performance of Redox Based Thermochemical Energy Storage Systems
- Creator
- Wu, Sike; Zhou, Cheng; Moghtaderi, Behdad
- Relation
- Proceedings of the 14th International Renewable Energy Storage Conference 2020 (IRES 2020). Proceedings of 14th International Renewable Energy Storage Conference (IRES) (Dusseldorf, Germany 10-12 March, 2020) p. 5-13
- Publisher Link
- http://dx.doi.org/10.2991/ahe.k.210202.002
- Publisher
- Atlantic Press
- Resource Type
- conference paper
- Date
- 2021
- Description
- CuO/Cu2O is a promising redox pair for thermochemical energy storage. This is primarily because of its suitable reaction temperature, high reaction enthalpy, high oxygen-carrying capacity, wide availability, and competitive cost. In this study, the influence of pressurized oxidation on a pure CuO/Cu2O-based thermochemical energy storage system is examined experimentally. Specifically, thermogravimetric analyses (TGA) and scanning electron microscopy (SEM) are employed to assess the reaction characteristics and morphology changes of pure CuO/Cu2O. According to the results, the oxidation of Cu2O (the rate-limiting step) is found to be faster and more complete under a pressure of 5.0-15.0 bar compared to the near-ambient pressure under 1.2 bar. Meanwhile, the tests of 20 redox cycles reveal that the reactivity of Cu2O can maintain 70-90%, but the agglomeration of particles is still present as a potential issue. The concept of pressurized oxidation is then applied to a utility-scale thermochemical energy storage plant in a case study. Based on the case study, the proposed storage plant can achieve a round-trip efficiency of about 41.0% and an energy storage density of nearly 500 kJ/kg under the oxidation pressure of 10.0 bar.
- Subject
- thermochemical energy storage; copper oxide; redox cycle; pressurized oxidation; thermogravimetric analysis
- Identifier
- http://hdl.handle.net/1959.13/1452056
- Identifier
- uon:44347
- Identifier
- ISSN:2589-4943
- Language
- eng
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